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The Nature and Origin of Structure in Broad Emission Line Profiles

Published online by Cambridge University Press:  12 April 2016

C. Martin Gaskell  and
Stephanie A. Snedden
C. Martin Gaskell
Affiliation:
Physics & Astronomy Department, University of Nebraska, Lincoln, NE 68588-0111, USA
Stephanie A. Snedden
Affiliation:
Physics & Astronomy Department, University of Nebraska, Lincoln, NE 68588-0111, USA

Abstract

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We postulate that all structure in broad lines can be explained by a central component (at the systemic redshift) and the addition of two ‘displaced components’, one blueshifted and the other redshifted. We have been able to successfully classify all Balmer-line profiles on this basis. 3C 390.3-type objects are merely examples where the shifts of the displaced components are unusually large. We believe that the displaced peaks are less prominent in the UV lines because the higher ionization lines are broader.

Type
III. Broad-Line Profiles and Variability
Information
International Astronomical Union Colloquium , Volume 159: Emission Lines in Active Galaxies: New Methods and Techniques , 1997 , pp. 193 - 194
Copyright
Copyright © Astronomical Society of the Pacific 1997

References

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Gaskell, C.M. 1996b, ApJ, 464, L107.Google Scholar
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